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-rw-r--r--builtin-grep.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/builtin-grep.c b/builtin-grep.c
index acc4eea363..5fac5701e6 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -459,6 +459,8 @@ static int external_grep(struct grep_opt *opt, const char **paths, int cached)
push_arg("-n");
if (opt->regflags & REG_EXTENDED)
push_arg("-E");
+ if (opt->regflags & REG_ICASE)
+ push_arg("-i");
if (opt->word_regexp)
push_arg("-w");
if (opt->name_only)